JETP Letters

, Volume 106, Issue 10, pp 637–642 | Cite as

Gravitational lensing of a star by a rotating black hole

  • V. I. Dokuchaev
  • N. O. Nazarova
Astrophysics and Cosmology


The gravitational lensing of a finite star moving around a rotating Kerr black hole has been numerically simulated. Calculations for the direct image of the star and for the first and second light echoes have been performed for the star moving with an orbital period of 3.22 h around the supermassive black hole SgrA* at the center of the Galaxy. The time dependences for the observed position of the star on the celestial sphere, radiation flux from the star, frequency of detected radiation, and major and minor semiaxes of the lensed image of the star have been calculated and plotted. The detailed observation of such lensing requires a space interferometer such as the Russian Millimetron project.


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Copyright information

© Pleiades Publishing, Inc. 2017

Authors and Affiliations

  1. 1.Institute for Nuclear ResearchRussian Academy of SciencesMoscowRussia
  2. 2.National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)MoscowRussia

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